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<\/a>What upscaling does to a photo<\/p>\nThe sensor is the part of the camera that catches light. It records the scene, and the phone then processes that recording into the photo you see in your gallery. Pixels can be added during that processing. So a saved photo can have more pixels than the sensor recorded.<\/p>\n
That\u2019s what\u00a0upscaling does: it adds pixels to an image that already exists<\/a>. The software looks at the pixels it has and works out what the new ones in between should be. Some methods give better-looking results than others. None of them can measure light the sensor never recorded. That\u2019s why a bigger photo isn\u2019t automatically a more detailed one. A larger file can help if you need a photo at a set size, but the pixel count alone can\u2019t tell you how much real detail is in it.<\/p>\n On the P4s Lite, 50 divided by 13 is about 3.85. So HI-RES photos have almost four times as many pixels as the default ones. Nothing in Realme\u2019s specs says they hold four times the detail.<\/p>\n Some phones go the other way and save photos with fewer megapixels than their sensors have. When we\u00a0reviewed the Infinix Zero Ultra in 2022<\/a>, we explained how its 200MP camera normally saved smaller photos through pixel binning. Binning combines information from neighbouring sensor pixels.\u00a0Samsung\u2019s 200MP HP1 sensor, for example, can combine 16 pixels into one<\/a>. So a smaller saved photo doesn\u2019t, on its own, prove a phone\u2019s advertised sensor resolution is wrong.<\/p>\n That\u2019s not what\u2019s happening on the P4s Lite. Its default photos are 13MP, the same as its camera, and its 50MP mode is upscaled. When you compare it with other phones, treat it as a 13MP camera that can also save bigger files. We haven\u2019t compared sample photos from the two modes, so we can\u2019t say whether those bigger files are worth using.<\/p>\n A bigger battery, the same 15W charging<\/p>\n The battery has a similar catch. Capacity, measured in milliamp-hours (mAh), is how much charge the battery holds. Charging power, measured in watts (W), is how fast energy goes in. So a bigger battery can keep a phone going longer. But if charging power stays the same, filling that bigger battery takes longer, everything else being equal.<\/p>\n The P4s Lite\u2019s\u00a0battery is 7,000mAh typical, 6,820mAh rated, and it charges at up to 15W. It also supports USB Power Delivery at 15W. That\u2019s a standard that lets the phone and charger agree on how much power to send over USB. Here\u2019s how it compares with the older\u00a0Realme P4 Lite:<\/p>\n SpecificationRealme P4 LiteRealme P4s LiteRear camera13MP13MP, with software-upscaled 50MP modeTypical battery capacity6,300mAh7,000mAhMaximum charging power15W15WMaximum screen refresh rate90Hz120Hz<\/p>\n That\u2019s about 11% more battery, with the same 15W charging. Don\u2019t read it as 11% more battery life, though. How long a phone lasts also depends on how much power it uses. The screen can now refresh up to 120 times a second, up from 90. Realme notes the actual rate depends on the app and what you\u2019re doing.<\/p>\n We\u2019d expect this setup to suit you if you can leave the phone on the charger for a while. If you depend on quick top-ups, the unchanged 15W charging is less helpful. Realme\u2019s product and spec pages don\u2019t say how long a full charge takes. And 15W is the maximum. Phones don\u2019t have to charge at their maximum the whole way.<\/p>\n